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Fencer Vulns
medium 4.3

CVE-2021-28544 json

Apache Subversion SVN authz protected copyfrom paths regression

published 2022-04-12 4 y ago modified 2026-06-17 4 mo ago also BIT-subversion-2021-28544 , EUVD-2021-15220

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Apache Subversion SVN authz protected copyfrom paths regression Subversion servers reveal 'copyfrom' paths that should be hidden according to configured path-based authorization (authz) rules. When a node has been copied from a protected location, users with access to the copy can see the 'copyfrom' path of the original. This also reveals the fact that the node was copied. Only the 'copyfrom' path is revealed; not its contents. Both httpd and svnserve servers are vulnerable.

Patch / fix

  • bitnami subversion 1.14.2
  • apple macos 12.5
  • subversion Debian 14, Debian 13, Debian 12 1.14.2-1

debian advisories DEBIAN-CVE-2021-28544

  • subversion Ubuntu 20.04 LTS 1.13.0-3ubuntu0.1
  • subversion Ubuntu 22.04 LTS 1.14.1-3ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2021-28544

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • subversion SLE Software Development Kit 12 SP5 1.10.6-3.6.1
  • subversion SLE Module for Server Applications 15 SP3, SLE Module for Development Tools 15 SP3, SLE Module for Basesystem 15 SP3 +1 more 1.10.6-150300.10.8.1
  • subversion SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +17 more 1.10.6-150000.3.21.1

suse advisories SUSE-SU-2022:1483-1SUSE-SU-2022:1162-1SUSE-SU-2022:1161-1

  • subversion Alpine 3.24, Alpine 3.23, Alpine 3.22 +9 more 1.14.2-r0

alpine advisories ALPINE-CVE-2021-28544

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • subversion CBL-Mariner 2.0 1.14.2-1

azure linux advisories AZL-9367

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • subversion Arch Linux 1.14.2-1

arch linux advisories AVG-2750

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-28544 updated cvss 4.3

subversion: SVN authz protected copyfrom paths regression

  • Red Hat Enterprise Linux 6 subversion, mod_dav_svn, subversion-kde, subversion-perl, subversion-ruby, subversion-gnome, +2 more Red Hat Enterprise Linux 7 subversion, mod_dav_svn, subversion-kde, subversion-libs, subversion-perl, subversion-ruby, +4 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 libserf, utf8proc, subversion, mod_dav_svn, subversion-libs, subversion-perl, +4 more Red Hat Enterprise Linux 9 subversion, mod_dav_svn, subversion-libs, subversion-perl, subversion-gnome, subversion-tools, +1 more
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.79% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • subversion.apache.org https://subversion.apache.org/security/CVE-2021-28544-advisory.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:P/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami subversion
>=1.10.0, <1.14.2
1.14.2

Affected products

  • Apache Software Foundation Apache Subversion

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.